I left New Street Station at two o’clock in the morning—cold, wet, and cheerless—and at half-past four was in the Midland Hotel at Sheffield, sleepy and fagged.

The night-porter knew nothing of Sir Mark Edwards’ address; therefore I had to wait until eight o’clock, when some more intelligent member of the hotel staff came on duty.

Everyone of whom I inquired, however, seemed ignorant; hence I took a cab and drove to the great works of the firm—a huge, grimy place, with smoky chimneys and heaps of slag, an establishment employing several thousand hands, and one of the largest, if not the largest, in Hallamshire. Here I was informed that Sir Mark resided thirty miles distant, at Alverton Hall, close to the edge of Bulwell Common, famed for its golf links.

Therefore at ten o’clock I took train there, and, finding a fly at the station, drove direct to the Hall to face and denounce the man who was an accomplice of assassins, if not the assassin himself, and a bold, defiant impostor.

The fly, after traversing a country road for a mile or so, suddenly entered the lodge-gates and proceeded up a splendid avenue of high bare elms, until we drew up at the entrance to a fine old Elizabethan mansion, the door of which was thrown open by a liveried manservant.

I held my breath for a second. My chase had been a long and stern one.

Then I inquired for the honoured and distinguished guest—who I had already ascertained at the works in Sheffield was supposed to be staying there—and was ushered with great ceremony into the wide, old-fashioned hall.

At last the impostor was near his unmasking. At last I would be able to prove to the world who killed Professor Greer!